glyph-name is converted to a musical symbol; for example,
\musicglyph #"accidentals.natural" selects the natural sign from
the music font. See The Feta font for a complete listing of
the possible glyphs.

Construct a note symbol, with stem and flag. By using fractional values for
dir, longer or shorter stems can be obtained.
Supports all note-head-styles.
Supported flag-styles are default, old-straight-flag,
modern-straight-flag and flat-flag.

This produces a note with a stem pointing in dir direction, with
the duration for the note head type and augmentation dots. For
example, \note #"4." #-0.75 creates a dotted quarter note, with
a shortened down stem.

This produces a rest, with the duration for the rest type and
augmentation dots.
"breve", "longa" and "maxima" are valid
input-strings.

Printing MultiMeasureRests could be enabled with
\override #'(multi-measure-rest . #t)
If MultiMeasureRests are taken, the MultiMeasureRestNumber is printed above.
This is enabled for all styles using default-glyphs.
Could be disabled with \override #'(multi-measure-rest-number . #f)